paroubek et au



an. 21,1931, M. PARQUBEKEW. 1 790,483

SOCKET FOR MINIATURE ELECTRIC LAIPS Filed Jan. 11. 1928 l v i.

Int/e "10! when positioned in the socket.

Patented Jan. 27, 1931 cairn STATES.

" ANTON J. PAROUBEK PATENT -FFICE SOCKET FO B MINIATURE ELECTRIC LAMPS Application filed January 11.11928. Serial Ilo. 246,038.

This invention relates to improvements in sockets for electric lamps, and particularly to sockets adapted to receive miniature elec-- tric lamps such as are used for ornamental purposes on Christmas trees and the like. In devices of this kind whichare manufactured in large quantities, it is highly "important that the device he so constructed as to be easily and quickly assembledto keep the cost of manufacture aslow as possible. v

1 Itiis therefore anobject of'the invention to providean improved socket for electric lamps which'isso constructedth'at it may be assembled in the minimum amount of time and with a minimum amountof labor.

'A further object of the invention is to provide an electric lamp socket which is of cheap, simple and durable construction, and which has the essentialmetallic part-s successfullywinsulated from'each other to prevent short circuits. v r j I Withf'the' foregoing-and other objects in view which will be made manifest in the'foL lowing detailed description and specifically pointed out in'the appended' claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein: Figure 1 is a top' plan view of the improved electric lamp socket. i V

Fig. 2' is a vertical section taken: upon the line 22 upon Figure 1.

Fig. 3 is a horizontal section taken upon the line 3 3 upon Figure 2; in the'direction indicated; 1 7

:Fig. 4 is a bottom plan view of the body forming the socket, illustrating the device in the first stages of being assembled.

Fig. 5 is a perspective view of the body. Fig. 6 is a perspective view of a part of the device which provides the central contact adapted to be engaged by the electric lamp Fig. 7 is a perspective view of-theretainving device associated with the socket,"which assists inholding its various parts together.

Referring to: the accompanying drawings wherein similar reference characters designate similar parts throughout,the improved lamp socket consists ofa tubular body 10 formed of insulating material such as porcelain, hard rubber or fiber. One end. of the body is provided with a cylindrical bore 11, and the other end has a many-sided counterbore indicated at 12. The drawing illustrates the body as having a squared counter-bore indicated at 12, but the particular shape is immaterial, it being merely necessary that ANnnuNcAN McMILLAN, or ALHAMBRA, CALIFORNIA; SAID MCMILLAN ASSIGNOR T0 SAID PAROUBEK the counter-bore at the bottom of the body 10 be non-circular. The bore 11 and counterbore 12 are defined or separated from each otherby means of. an internal shoulder '13, and'some distance above this shoulder an external annular shoulder is formed on the snugly fits within the bottom of the body 10.

In the bottom surface of the body thereare formed a plurality of notches or openings 17 which permit insulated wires indicated at The 18, 19 and 20 to be positioned therein. The

wire 18 is shown as having its end soldered or otherwise secured against thetop surface of the flange 16, forming an electrical connection'between the wire 18 and theferrule 15. The end of the wire assumes a position between the flange 16 and the shoulder 13. The Wire 19 has its end positioned against the back of a section of insulating material 21, which section of insulating material fits snugly'within the non-circular counter-bore 12.. A metallic rivet 22 is positioned at the centerof the section 21 and has its shank extending through the section. Ifthe wire 19 is formed of a plurality ofstrands, the shank is extended. between the strands and riveted. over to form an electrical connection between the wire 19 and the rivet 22. The rivet may alsobe connected to the wire 1.9 in other 'manners such as by soldering. The

top of the rivet forms a contact centrally of the ferrule 15 and at the base thereof, adapt-- on the conventional miniature electric lamp.

In assembling the socket, the ferrule 15 has the wire 18 connected to its flange and is in serted into the body through its bottom. The section of insulating material 21 carrying the rivet- 22 and having the wire 19 connected thereto, is then positioned against the flange 16. A self-hardening plastic material indi cated at is then poured through the bottom of the body while the body is in inverted po sition, filling the bottom of the body and serving to hold the section of insulating material 21 against the flange 16. This self-hardening plastic material may be sealing-wax or any other material which will harden on cooling, and which will serve as an insulator. Additional means is provided for holding these parts together which is shown as consisting of a flat section of insulating material 24- coverin g the bottom of the body 10 and the sealingwax 23. A retaining device having circular bottom 25 is positioned against the section 2%, and this retaining device which is formed of metal, has upstanding arms 26 which extend upwardly against the exterior of. the body and have their upper ends 27 clinched over against the shoulder 14. As shown upon Figure 3, the body 10 is provided with four notches or openings 17, two of which are occupied by the wires 18 and 19. The other two notches are occupied by a wire 20 which is in no way electrically connected to the socket In a two-wire system the wires may be arranged in this manner and the socket will-thus serve to hold the wires adjacent each other. Alternate sockets may have the wire 20 connected to the rivet 22 and flange 16 respectively, and in these alternate sockets the wires 18 and 19 will be joined to each other and assume a position in the socket corresponding to the position occupied by the wire 20 in Figure 3. 7

From the above described construction it will be appreciated that a novel socket for miniature electric lamps is provided, which is of cheap, simple and durable construction and which may be easily and quickly assembled. Furthermore, the ferrule 15 and the rivet 22 are effectively insulated from each other so that there will be little danger of short circuits. The flange 16 serves a double function, one function being to prevent withdrawal. of the ferrule through the open end of the body 10, and the other function is developed by virtue of the fact that the flange fits against the walls of the non-circular end of the body and prevents rotation of the furrule due to frictional contact with the lamp as it is being screwed into or out of the socket. In a similar manner, the section of insulation 21 and rivet thereon are held against rotation by the lamp as it is screwed into or out of the socket.

Various changes in the details of construction may be made without departing from the spirit or scope of the invention as defined by the appended claims.

We claim:

1. A socket for electric lamps comprising a tubular body, a flanged ferrule positioned in the body adapted to receive a lamp, one side of the flange on the ferrule being positioned against an internal shoulder on the body, a section of insulation positioned against the other side of the flange, a contact carried-by said section of insulation in position to be engaged by the lamp, and means for keeping the section of insulation against the flange 2. A socket for electric lamps comprising a tubular body, a flanged ferrule positioned in the body adapted to receive a lamp, one side of the flange on the ferrule being positioned against an internal shoulder o'nthe body and being non-circular, a section of insulation positioned against the other side of the flange, a contact carried by said 'sec tion of insulation in position to be engaged by the lamp, and means for keeping the section of insulation against the flange.

8. A socket for electric lamps comprising a tubular body, a flanged ferrule positioned in the body adapted to receive a lamp, one side of the flange on the ferrule being positioned against an internal shoulder on the body, a section of insulation positioned against the other side of the flange, a contact carriedby said section ofinsulation inposition to be engaged by the lamp, and means for keeping the section of insulation against the flange, there being openings formed in the walls of the body permitting conductors to be positioned therein and connected to'the ferrule and contact respectively.

4. A'socket for electric lamps comprising a. tubular body formed of insulating material, one end of whiclihas a cylindrical interior surface and the other end having a non-cylindrical interior surface, there being a shoulder between the mentioned surfaces, a metallic flanged ferrule fitting within the cylindrical end of the body and having one side of its flange bearing against saidsh'oulder andthe edges of the flange fitting'against the non-cylindrical walls of the second mentioned end, said ferrule being adapted to have a conductor connected thereto, a section of insulation fitting against the other side of the flange and carrying a contact, and means for golding the section of insulation against said ange.

5. A socket for electric lamps comprising a tubular body havinga cylindrical interior surface adjacent one end and a non-cylindrical interior surface adjacent the other end, a metallic ferrule fitting Within the cylindrical end of the body and having a flange fitting the non-cylindrical end of the body, a section of insulation positioned within the non-cylindrical end of the body against said flange, a contact carried by said section of insulation, a self hardening plastic material positioned in the non-cylindrical end, conductors connected to the ferrule and contact respectively, and a'.

disc positioned over the bottom of the body. 6. An electric lamp socket comprising a body of insulative material and having a bore therethrough with a counter-bore at one end thereof, a ferrule seated Within said bore, a flange on said ferrule seated upon the bottom of said counter-bore holding the ferrule against displacement in one direction through said bore, a plate of insulative material seated upon said flange and extending across the bottom of said ferrule, the contact extending through said plate, a conductor electrically connected to said contact, another conductor electrically connected to said ferrule, and means for holdin the ferrule and contact plate against disp acement in the other direction in respect to the bore. V

In testimony whereof We have signed our names to this specification;

V ANTON J. PAROUBEK.w V

' n. MoMILLAN, 

